Vinyl acetate (C₄H₆O₂) is commonly used in producing industrial chemicals. A 20.0 g sample of C₄H₆O₂ is dissolved in 70.0 grams of water. The solution obtained has a density of 0.982 g/mL. Determine the molarity of the solution.

The overall concentration of creatinine (C₄H₇N₃O) in urine was carefully approximated as 5.92 mM. Calculate the amount (in g) of creatinine present in 10.0 mL of a urine sample collected during an annual check-up. 

A chemist added 375 mL of 4.2 x 10^-3 mM silver(II) oxide, AgO, solution to a flask. Determine the mass in micrograms of AgO the chemist has added to the flask. Express your answer to 2 sig figs.

A calcium bromide solution contains 185 mmol of calcium bromide (CaBr₂). If the concentration of the solution is 2.85 mol/L, calculate the volume of the solution in milliliters. Answer in the correct number of significant figures.

Commercial grade HCl solutions usually have a concentration of 31.0% by mass HCl in water. If the solution has a density of 1.20 g/mL, calculate the molarity of the HCl solution.